OpenVPN connection to port 443 is being dropped by network. Is this a policy?

Hi AT&T,

I have reconfigured to UDP port 1194 (openvpn), and I can confirm my issue is resolved!  The connection is very stable now.  Thanks so much for your help!

Hello @coolmott, let’s address your concerns.

For better assistance in regards to OpenVPN connections on ports, please contact our paid ConnecTech service at 1-866-294-3464 for better assistance in regards to your issue.

Mihai AT&T Community Specialist

We believe that we may have come to a misundestanding, @coolmott, so allow us to try and clear things up.

ConnecTech is a paid service for advanced tech support, so that you may be able to find a resolution for issues that may be outside the scope of most representatives.

However, we are not without some resources, and we have done some research since we last reached out to you. It appears that port 443 is commonly used by AT&T to assist with the delivery of the U-verse IPTV service. This may explain the issues you are experiencing.

Have you also tried using UDP 1194? We've found that this is also used by OpenVPN users, so it may benefit you as well.

We hope this helps!

Alexander, AT&T Community Specialist

Thanks for reaching back @coolmott!

We are standing by to further assist with your VPN connection inquiry, just let us know!

In the meantime, here's some more information on AT&T Secure Wi-Fi VPN. Scroll to the bottom, click on 'See all important details'.

Denise, AT&T Community Specialist

We're glad to hear that your connection is stable, @coolmott!

We're always happy to help, so if you have any other questions for us, feel free to reach back out! Thank you for being an AT&T customer!

Alexander, AT&T Community Specialist

Wow ... 4 years later and I run into the exact same issue - but without the workaround :-(

I work from home (a mixed bag, that), using AT&T Fiber.  Today, our area lost internet :-(

No problem I though to myself ... I've used my phone(AT&T unlimited plan) as a hotspot for eons.

Guess what, the Corporate required VPN is a CISCO box we connect to using port 443 - so... no dice ...  colour me less than pleased...

I guess we move phone service back to Verizon, or more likely Google Fi

Then, there's the fact that on AT&T wireless, the hotspot speeds are very bad in comparison to what we had on Verizon.
Today, I'm seeing very sporadic performance - just now 38MB down, 4MB up on a 5G service pulling not much better than that for non-hotspot traffic

Hello @kenpocowboy, we are here to assist with your VPN connection concerns.

Let's begin by checking to make sure that you are truly impacted by an outage. Click here to check for outages. You can check by zip code, or you can also sign into your account, so you are able to confirm if your account is affected by the outage. 

If an outage is not found, you can restart the router to check if the service is restored.

As far as the VPN connection is concerned, have you attempted to reach out to your company's IT department for assistance? In some instances, your Company VPN has not been set up or needs permissions, depending on their security settings and requirements. Reaching out to your IT Department is recommended. They can assist you with authenticating your access and changing settings on your PC, if needed.

Please let us know if you need additional assistance.

Amon M, AT&T Community Specialist